Dr. Rasu Shrestha will join the Charlotte, N.C.-based health system in February from UPMC, where he was chief innovation officer. The radiologist will replace Carol Lovin, who was promoted to Atrium's system chief of staff.

Two pension funds that own stock in Centene Corp. are suing the health insurer and certain directors and officers, claiming Centene acquired Health Net in 2016 for $6 billion without fully disclosing the company's significant financial problems.